Published June 1, 2005
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Journal Article
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Enhanced temporal resolution in femtosecond dynamic-grating experiments
Chicago
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Abstract
Recording of gratings by interference of two pump pulses and diffraction of a third probe pulse is useful for investigating ultrafast material phenomena. We demonstrate, in theory and experiment, that the temporal resolution in such configurations does not degrade appreciably even for large angular separation between the pump pulses. Transient Kerr gratings are generated inside calcium fluoride (CaF2) crystals by two interfering femtosecond (pump) pulses at 388 nm and read out by a Bragg-matched probe pulse at 776 nm. The solution to the relevant coupled-mode equations is well corroborated by the experimental results, yielding a value of the Kerr coefficient of ~ 4.4×10^(–7) cm^2/GW for CaF2.
Additional Information
Copyright © 2005 American Institute of Physics. Received 3 December 2004; accepted 5 April 2005; published online 8 June 2005. We thankfully acknowledge the financial support from the NSF (Engineering Research Centers Program for Neuromorphic Systems Engineering under Award No. EEC-9402726, NSF-Germany Cooperative Research Grant No. INT-0233988), the Deutsche Telekom AG and the DFG (Award No. BU 913/13-1).Files
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